Different Transmission Enhancement Mechanisms In A Sandwiched Nanofilm

Keywords

enhanced transmission; localized surface plasmons; mechanisms; propagating surface plasmon polaritions

Abstract

Using numerical approaches, two different mechanisms leading to enhanced transmission in a sandwiched nanofilm are demonstrated. The film is composed of a flat silver layer and two layers of silver prisms arrays on its both sides. The central flat silver layer is coated with glass substrates on its both sides and the silver prisms arrays are deposited on the glass layers. In the calculations, two different mechanisms leading to enhanced transmission are found. One mechanism follows the conventional believing in which the resonance wavelength depends on the neighboring distance between silver prisms in the array. The enhancement is due to the coupling of propagating surface plasmon polaritons (SPPs). In another mechanism, the resonance wavelength depends on the distance between the silver prisms array and the flat film rather than the neighboring distance between silver prisms in the array. The enhancement is due to the localized surface plasmons instead of propagating SPPs. By changing the thickness of the glass layers, these two mechanisms can also work cooperatively. Parameters that affect the enhanced transmission of the sandwiched nanofilm were also briefly studied.

Publication Date

8-1-2017

Publication Title

Particle and Particle Systems Characterization

Volume

34

Issue

8

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1002/ppsc.201600327

Socpus ID

85012952443 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85012952443

This document is currently not available here.

Share

COinS